Samsung is working on a gamepad for its latest smartphones, showcasing a prototype of the design at the Galaxy S IV launch.

Samsung is working on a gamepad for its latest smartphones, showcasing a prototype of the design at the Galaxy S IV launch.

The controller is similar to others we have encountered in the past, such as the Android Moga gaming system. It features a slew of traditional gaming buttons, including a D-pad, analogue sticks, A, B, X, and Y buttons, and Start, Select, Menu and Back keys.

For the screen and gaming power, users slot their smartphone into the holder and use the smartphone's screen to display their games. The controls transmit signals via Bluetooth to the attached smartphone, and the controller itself is powered by two AAA batteries, so it can be used on the go.

Engadget got some hands-on time with the device, stating that it is big enough for the Note II's 5.5-inches, and suggesting it might also be able to hold future, larger Samsung “phablets.”

Some have criticised the gamepad's similarity to the Microsoft Xbox 360 controller, which could spark legal issues similar to those with rival Apple. This is an early prototype, however, and its design could change significantly before release.

There are no prices or other details yet, but it is expected to launch during the summer.